Final answer:
Historians have proposed theories for the downfall of the Minoan civilization, including destruction by tidal waves, invasion by the Mycenaeans, and economic decline from deforestation.
Step-by-step explanation:
Historians have provided several theories for the downfall of Minoan civilization. One theory suggests that the destruction of coastal cities by tidal waves was a contributing factor. Another theory attributes the downfall to an invasion by the Mycenaeans, a neighboring civilization. Additionally, economic decline due to deforestation is another theory put forward by historians.